I have a couple of questions.
1. What is a capacity of the finished flask?
2. You mention that you are married right so how the hell do you get away with this in the lounge????
1. About a pint and a half.
2. Easy, I go halves on any profit I make from my leatherwork. She spends hers on whatever she wants, and I spend mine however I want. It doesn't interfere with the housekeeping money so we are both happy. (I do clean it up afterwards though).
Some questions on the grooves though.
Do you cut groves on both sides to neaten it up or only on one side?
If on both then do you do the second side before or after making the holes?
I cut the grooves on one side only, then drill the holes. The leather is still fairly soft so the sinew "bites" on both sides.
can i ask however, how well this stands up to holding cider
Very well actually. Especially if it is naturally carbonated. Strong drink such as whisky, vodka etc also work very well. Hot drinks of any kind are a no-no, as the heat will melt the wax, and I have found Coca-Cola eats the wax slowly so that should be avoided.
I've also found that orange squash leaves an after taste. Surprisingly, water works well too.